Diamond millstone-dressing machine



(No Model.)

T. O. BARNES.

DIAMOND MILLSTONE DRESSING MACHINE. No. 286,251. Patented 001;. 9, 1883.

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liiwirn STATES THOMAS C. BARNES, OF

LQGANSPOBT, INDIANA.

DIAMOND MlLLSTONE-DRESSING MACHlNE.

SPECIFICATION forming partof Letters Patent No. 286,251, dated October 9, 1883.

Application filed May 4,1882. (No model.)

I a. whom, it may concern:

Be it known that I, THOMAS C. BARNES, of Logansport, in the county of Cass and State of Indiana, have invented a new and useful Diamond Millstone-Dressing Machine, of which the following is a full, clear, and exact description, reference being had. to the accompanying drawings, in which Figure 1 represents a plan view of my improved apparatus. Fig. 2 represents an end view of the same. Fig. 3 represents a longitudinal section of the frame, lipped radiating beam pivoted thereto, and rack. Fig. 4 represents a horizontal section through the feeder, showing one end of the radiating beam, the trigger, and the crank-sh aft of the feeder. Fig. 5 represents an end view of the feeder with the trigger inserted in the circular cavity in the end of the feeder. Fig. 6 represents an inverted plan view of the trigger and its spring, and Fig. 7 represents an edge view of the trigger.

Similar letters indicate like parts in all the figures.

My invention relates to improvements in machines for dressing millstones; and it consists of a slotted bed-plate adapted to rest on the face of the millstone to be dressed, with one end at the eye of the stone, to which bedplate is pivoted,at its inner end,a slotted radiating beam adapted to turn circularly on the bed-plate, and also to revolve axially on a gudgeon, the radiating beam carrying a slide in its slot, provided with ahandle on its upper face, by means of which the slide is reciprocated, and provided with a diamond on its lower face, to cut the stone in the reciprocations of the slide, the latter being provided with an adjustable gage-plate, which operates a trigger t in a cavity in one end of a feeder, provided with spiral grooves on its outer surface, which engage witha curved rack secured to an adjustable bolster, and impart a circular movement to the outer end of the radiating beam,secured to the feeder or driver, as hereinafter more fully set forth.

In the accompanying drawings, A represents the bed-plate of the machine,1:)rovided with a longitudinal slot, a. One end of the headplate A is placed at the eye of the millstone, as shown in Fig. 1, and rests thereon,with its 1 opposite end projecting beyond the circumference m of the millstone.

B represents a radiating beam, pivoted at its inner end to the bed-plateA by the threaded bolt, J, provided with a shoulder, (O, for the end of the radiating beam B and gudgeon I to rest on. The pivot-bolt J passes through holes L and K in the radiating beam B and bedplate A, and is secured in place by the nuts G and H, as shown in Fig. 3. The beam B can be raised or lowered by turning the bolt J at its upper end. The bolt J can be inserted in any of the series of holes L L K K, as shown in Figs. 1 and 3, when required to be on a level surface. The beam B is provided with a longitudinal slot, 1), in which a slide, U, is made to reciprocate. The slide U is provided with a handle, T, on its upper face, by which it is op erated, and carries a diamond on itslower face, projecting through the slots at b in the bedplate and radiating beam, whereby the millstone-dress is cut.

S represents asliding gage-plate, adjustably secured to the top face of the slideU by means of the slot 0 and setscrew d, for the purpose of regulating a trigger, presentlydescribed, and provided with lips c,for operating the trigger D. The triggerD is provided on the rear end of its lower face withashort curved projection, h, to whicha curved spring, 6, is secured. The curved projection h and curved spring 0 are adapted tent in a cylindrical cavity or ring, V, in the inner end of a feeder or driver, 0, provided with spiral grooves on its outer surface. The cavityVis formed between the hub 11 of the feeder and the internal surface of the cylinder or ring, and into this cavity the curved projection h is inserted, a portion of the lower face of the trigger, near its rear end,resting 'on side of the cavity V and holding the trigger in place. By this construction the trigger D, operated by the lips of the gage-plate S in the reciprocations of the slide by means of its handle T, will turn the trigger in its cavity V without moving the feeder; but when reciprocated in the opposite direction, the spring will be brought to bear on the side of the cavity V, and rotate the feeder. The gage is provided the end of the feeder, and the outer face of the, forward end of the spring bearing against the.

. feeder O is secured in position on its eccentricsecured in the inner end of the radiating beam I shaft R by a thumb-nut, 1E. v

F represents a crank-nut to secure the shaft 'Rto the beam B, and also for throwing the feeder G in and out of gear with a curved rack, M, with which the feeder 0 engages. The curved rack M, which engages with the spiral grooves on the outer surface of the feeder O, is secured to an adjustable or tipping bolster, N, by screws Q Q. The bolster N is hung on a pivot, Y, which passes through its center and into the middle of the end of the bed-plate A. Slots P P and bolts 0 O and nuts are provided, whereby the bolster may be adjusted, as desired, and held in place.

R (see Fig. 3) isa'lip,which projects at the bottom of the radiating beam B, at the end of the latter, and passes under the curved cogframe M.

I represents a pivoted shouldered gudgeon,

B,- thus allowing the radiating beam B to turn 011 the shoulder of the gudgeon,or on its axis. The beam B is held in any desired position by the threaded bolt Z. I

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a machine for dressing millstones, the combination, with the pivoted tipping or adjustable bolster N, having slots P 1?, and the radiating beam B, connected therewith,of the shouldered gudgeon I, having clamp-screw Z, for securing said beam in any adjustment around its own axis, and the center pivot-bolt, J, fixed in frame A, all as shown and described.

2. In amachine for dressing millstones, the 'combin ation vith the pivoted beam B, having lip R, and the bed-plate A, of the notched plate M, the spirally-grooved feeder O, trigger 1), connected with the latter, the diamondcarrying slide U, and its attached gage S, all as shown and described, to operate as and for the purpose specified. v

THOMAS C. BARNES.

\Vitnesses:

WILLIAM EMMETT, DAVID MIDD ETON. 

